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High-Fat Diet Exacerbates Neuropathology in a Transgenic Mouse Model of Multiple System Atrophy.
Marie-Laure Arotcarena1, Anna Delamarre1,2, Miguel Lopez-Cuina3
1IMN, Univ. Bordeaux, CNRS, UMR 5293, Bordeaux, France.
Summary
Diabetes and insulin resistance worsen multiple system atrophy (MSA) neuropathology and motor function in mice. Modulating glucose metabolism may offer therapeutic benefits for MSA progression.
Area of Science:
- Neuroscience
- Metabolic Disorders
- Neurodegenerative Diseases
Background:
- Multiple system atrophy (MSA) is a rare, severe neurodegenerative disorder.
- Evidence suggests diabetes and insulin resistance may negatively impact MSA.
- This study explores the link between glucose metabolism and MSA.
Purpose of the Study:
- Investigate the association between diabetes, impaired glucose homeostasis, and MSA neuropathology.
- Utilize a rodent model to understand these complex interactions.
Main Methods:
- PLP-SYN transgenic mice (MSA model) were fed a standard or high-fat diet (HFD) for 4 months.
- Diet-induced metabolic alterations were induced to mimic diabetic conditions.
- Metabolic, neuropathological, and behavioral outcomes were assessed.
Main Results:
- HFD-fed PLP-SYN mice showed exacerbated diabetic phenotypes, including glucose dysregulation and insulin resistance.
- MSA neuropathology worsened with HFD, marked by increased alpha-synuclein and dopaminergic neurodegeneration.
- Fine motor function impairment accelerated in HFD-fed MSA mice.
Conclusions:
- Dysregulated glucose metabolism is linked to MSA neuropathology.
- Modulating glucose metabolism could potentially slow MSA progression.
- Antidiabetic agents may offer therapeutic benefits for MSA patients.
